thierry



UNITED STATES PATENT EEICE..

JULES A..THKIERRY AND ALFRED L. THIERRY, -OF LONDON, ENGLAND.

METHDD OF FORMING HEADED ARTICLES 0F MANUFACTURE.

SPECIFICATION forming part of Letters Patent No. 624,404, dated May 2,1899.

Application led January 24, 1898. Serial No. 667,755. (No model.)

To @ZZ whom it may concern.:

Be it known that we, JULES ALPHONSE THIERRY and ALFRED LEON THIERRY,subjects of the Queen of Great Britain, residing at 292 Regent street,in the city of London, England, have invented certain new and usefulImprovements in Methods of Forming Headed Articles of Manufacture, ofwhich the following is a specification.

Our invention resides in an improved method of forming headed articlesof manufacturesuch as shoe-buttons, upholsterynails, hat-pins, and thelike-the same being carried out in the manner hereinafter described andclaimed.

In the drawings, wherein our invention is illustrated in connection withthe manufacture cfa nail-head, Figure 1 is a section of the pair of diesrst employed. Fig. 2 is a section showing the celluloid in the lower ofthe two dies. Fig. 3 is a section of the second upper die holding a nailto be headed or a shank for a button. Fig. 4 is a section Showing thedie shown in Fig. 3 applied to that shown in Fig. 2.- Fig. 5 shows thedies modied to form nail-heads or buttons round on both sides. Fig. 6 isa side view of a nail with a head formed by employing the dies shown inFig. 4,- and Fig. 7 is a side view of a'button formed by employing thedies shown in Fig. 5.` Y

Between die-plates A and B, such as are shown in Fig. 1,- we place athin sheet of celluloid softened by heat or by impregnating it withalcohol or other solvent. On pressing the dies together the celluloid Cis molded into the recesses of the die B, as shown in Fig.

2. We provide another die D, having holes to receive the Shanks N ofnails or pins to be headed or the Shanks S of buttons, these shanksbeing placed in the holes after a thin sheet C of celluloid, which hascorresponding holes through it, hasv been placed on the face of the dieD. The hollows in the celluloid C being filled with cheap material M,such as cement, coarse pulp, disks of pasteboard, Wood, or othermaterial of little value, the faces of the celluloid sheets C and C arebrushed over with solvent or preferably dissolved celluloid and thenarepressed together, as shown in Fig. 4, causing the sheets to adhere as ifthey formed one sheet of double thickness in all the parts between themolds.

The drawings Figs. l to 4, inclusive, are

suited for flat-'sided nail-heads, such as are shown in Fig. 6, or forfiat-sided buttons. When round heads or round buttons, as shown in Fig.7, are required, an upper die E, Fig. 5, is employed, having recessesinto which the celluloid C is pressed, and in this case the cheapmaterial M is lled partly into the recesses of both sheets of celluloid,which are caused to cohere, as described with reference to Fig. 4.

Although in order to simplify drawings and description we have showndies of comparatively 4small size,each for a single nail and a singlebutton, it is to be understood that these dies may be plates ofconsiderable area, with a number of the recesses and correspondingpunches arranged in rows at equal intervals over the surface of theplates. It is also to be understood that some of these die-plates may beadapted for nails or pins only and some4 for buttons only. When thecelluloid sheets have been caused to cohere, as above described, eachpair forming a single sheet, with the heads and buttons projecting onthe one side or on both sides, this sheet is subjected to the action ofrevolving cutters which cut round the edges of the heads or buttons,separating them from the sheets, and these edges can be afterwardtrimmed by subjecting the A heads or butt-ons to revolving polishers orpressing them between suitable dies.

Having thus described the nature of this invention and the best means weknow of carrying the same into practical effect, We claimlThe method offorming headed articles, which consists in softening a sheet of`celluloid and molding a depression therein, inserting in saiddepression a valueless filling material, applying a second sheet ofpreviouslysoftened celluloid containing a shank to the softened sheetcontaining the depression, forcing said sheets into close contact untiltheir adjacent surfaces adhere to each other, and finally cutting andpolishing the projecting side edges of said sheets.

In testimony whereof we have hereunto set our hands in presence of twosubscribing witnesses.

JULES A. THIERRY. ALFRED L. THIERRY.

Witnesses:

OLIVER IMRAY, JNO. P. M. wMILLARD.

IOO.V

